Treatment of slag.



G. L. DANFORTH, JR.

I TREATMENT OF SLAG. APPLICATION FILED JUNE 17, 1911.

Patnted Apr. 8, 1913.

' to take the lumps of slag to the drop or 30.

UNITED sT trEs PATENT OFFICE.

GEORGE L. DANFORTH, JR, OF CHIGAGQ,-ILLINOIS.

I TREATMENT OF SLAG.

To all whom it may concern:

Be it known that I, GEORGE L. DANFORTH, J r., a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,.have invented certain new and useful Improvements in Treatment of Slag, of which the following. is a specification.

My invention relates to the treatment of slag or cinder, and is especially, though not exclusively, adapted for use in connection with handling and breaking up slag from open hearth furnaces.

Heretofore it has been customary to pour the liquid slag formed in open hearth furnaces into a metal box or pot which is of such shape and size that the slag solidifies into a large, bulky lump, which must be broken up into small pieces suitable for shipment. This large lump is ordinarily first chilled, and is then taken under a drop,

where it is broken up, and the small pieces are then either whand-shoveled or loaded by a grab bucket into cars preparatory to shipment. It will be apparent that there are disadvantages about this methodzFirst, a large e uipment of metal boxes or pot-s is require second, it is necessary to use transfer cars and other equipment in-order other device by which it is broken up, and, third, the labor cost for handling the material in this way is high.

In my improved method I provide a receptacle constructed of metal, this receptacle having a large plan area compared to the amount of slag whichis to be poured into it.at any one time, so that the liquid slag spreads out and instead-of forming a large lump which is diilicult to break up it forms a thinslab or sheet, preferably about six inches in thickness and of large exposed surface. I preferably apply water to this slab of, slag so that the latter is rapidly chilled and small shrinkagecracks are formed. The receptacle is preferably of such depth that it will hold several slabs of slag, one being pouredon to of the other. The addition of successive slabs serves further to crack and disintegrate the slabs underneath which have been previouslypoured. Moreover, by using a large receptacle it is unnecessary to empty it as frequently as would be the case were a small one employed. Contained within the receptacle I prefer to use agitators, by means of which the slag is thoroughly disinte- Specification of Letters Patent.

grated and readily flows througha slot in the bottom of the receptacle into a car which is set beneath the platform on which the re-' ceptacle is preferably placed. .By my improved method it will be clear to 'those skilled in the artthat a great saving is effected in the preliminary cost of equipment, and that the operating cost for labor is also greatly decreased. These and other advantages of my invention will be more readily understood by reference .to the accompanying drawings, which represent a preferred form of apparatus by which mymethod may be carried out, and in which Figure 1 is a side elevation partly broken away showing the slag flowing from the receptacle into a suitable car; Fig. 2 is a vertical cross-section through the receptacle showing several layers of slag in position, and,Fig. 3 is a vertical cross-section through the slag-receiving receptacle, on the line 3-3 of Fig. 1.

The slag-receiving receptacle 5 is'preferably formed with a curved bottom, and is constructed of iron, s teel or other suitable metal Extending longitudinally along the bottom of the receptacle is a slot 6, the purpose of which will hereafter be apparent. In order to support the receptacle when it is placed on the ground or on a suitable Patented Apr. 8, 1913.- Application filed June 17, 1911. Serial No. 633,885.

platform, the frame members 7 are attached to the receptacle by means of rivets or bolts 8.. In place of using a plurality of frame members, suitable bent plates may be used to inclose the bottom of the receptacle 5, if such are preferred.

Attached to the receptacle 5 are the brackets 9, 9, each of which contains a pin 10 adapted to be engaged by a hook 11 attached to-a hoist of a crane. By means of the two brackets 9, 9, it will be evident that the receptacle 5 may easily be handled by] a crane in much the same manner as an ordinary ladle for containing molten steel.

Within the receptacle 5 is'a plurality of agitators 12, each of which consists of a base 13, preferabl triangular in cross-sectional area and a apted to rest within the receptacle 5 and cover the slot 6. Attached to the base 13 is the stem 14 terminating in the ring'or eye 15. When all of the agitators 12 are placed in position, the slot 6 in the bottom of the receptacle 5 is covered throughout its entire length by the bases 13 of the agitators.

My improved method of operation may.

' formed which is 7 a manner just described. After this, successol.

new readily understood. When a heat is tapped from an open hearth furnace the slag is allowed to flow into the bottom of the receptacle 5, being prevented from flowing; through the slot 6 by means of the bases 13 of the agitators 1.2. The slag which is thus poured into the receptacle forms a layer 16 in the bottom of the latter. In order to cool. the slag quickly and cause the formation of shrinkage cracks, I preferably ap ly water to the surface of the slag. V on it is desired to pour additional slag into the receptacle, a second layer 17 is referably cooled in the sive layers 18, 19 and 20 may be added, or as many more as the capacity of the receptacle will allow. After the slag within the receptacle has become suhiciently cool to be readily handled, the receptacle is raised means of a crane, the main hoists of which engage the pins, 10, of the brack- 9, 9, and the receptacle is placed on a platform. 21, being prevented from rocking by means of the frame members 7. The

main hoists of the crane being removed from the pins 10, 10, one of the auxiliary hoists is attached. to the eye of one of the agitators 12, this agitator then being moved up and down, and the which is already. filled with fine cracks is readily broken up and :Ziows through the slot 6 in the bottom of the receptacle into the car 22, which is placed below the platform 21. All of the ors l2 successively moved in'the' ear 1 escribed, and in this way all a finely broken up condition cred into the car 252.

gitators Within the rig the slag" to pass may deposit the variexact method which ll have described with out departing from the spirit or scope of my invention. 7

l i' hat 11' claim is:

-l. The method of handling slag or other similar friable material, which consists in pouring" molten slagover a teusion member, and then pulling such member through the slag, ii llfiiflbf, the latter is disintegrated.

'llihe method of handling slag or other it mentioned, and

similar friable mater al, which consists in pouring molten slag over a plurality of tension-members, and then pulling the latter up through said slag, whereby the latter is disintegrated.

3. The method of handling slag or othe similar friable material, which consists in embedding a tension member in the molten slag while such member is stationary, and then separating such slag and member,

whereby the slag is disintegrated.

4. The method of handlingslag or other similar friable material, which consists in embedding a tension member in the molten, slag while such member is stationary, allowingethe slag to cool, and then withdrawing such member from the slag, Wherebythe latter is disintegrated.

5. The method of handling slag or other similar friable material, which consistsf-in forming a bed for the reception of molten slag; placing a tension-member on such bed; pouring the moltenslag on said bed over such member while the latter is stationary, and-allowing such slag to cool; and then separating said tension-member and slag, whereby the latter is disintegrated.

6. The method of handling slag or other similar friable material, wh ch consists in placing a tension-member on a bed adapted to receive molten slag; pouring such molten slag into such bed; allowing such. slag to cool; then pulling said member through the slag, whereby the latter is disintegrated.

7. The method of handling slag or other similar friable material, which consists in placing a tension-member on a bed adapted to receive molten slag; pouring such molten slag upon a portion of said tension member;

and then lifting'the latter from such slag, by means of a lifting device attached to the exposed portion of such member. 8. The method of handling slag or other similar friable material, whlch consists in placing a plurality of tension-members on .a bed adapted to receive molten slag; ouriug such molten slag upon portions 0 such 'tension-members; allowing such slag to cool; and then lifting the tension members from such slagby means of a lifting device. attached, to the exposed portions of such members.

9.. The method ofhandling slag or other similar friable material, which consists in laying a plurality of tension members upon the bottom of a bed ada ted to receive molten slag; ouring such s ag upon said members and saving one end of each of same exposed; allowing the sla to cool; and then. lifting each of such mem ore from the slag by means of a lifting device attached tosuch exposed ends; I

p 10. The method of treating slag and the like, which consists in pouring a sufficient amountof' liquidfslag into a receptacle of stantially as described;

layer has solidified, and agitating said slag,-

whereby itis broken into sir iall pieces, sub- 11. The method of treating slag and the like, which consists in'pouring the liquid slag into a receptacle containing agitators, whereby the latter will become embedded in the slag, allowing said slag to cool, and actuating said agitators, whereby the slag will be disintegrated, substantially as described.

12. The method of treating slag and the like, which consists in pouring the liquid slag into a receptacle having an opening in its bottom and containing agitators which cover said opening, whereby said a itators will become embedded in the slag, a lowing the slag to cool, and actuating the agitators, whereby the slag will be disintegrated and escape through the opening in the bottom of said receptacle, substantiall as described.

GEORGE L. DA FORTH, JR. Witnesses:

H. E. CULLEN, S. P. HELME. 

